<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <h1>hello ${name!'默认值'}</h1>
    <#assign a=1>
    <h1>${a}</h1>
    <ul>
        <#list strings as s>
            <li>${s_index} ${s}</li>
        </#list>
    </ul>
    <#if isMale>
        你是男性
    </#if>
</body>
</html>